Project Image onto Cubemap
To make texture appear on the mesh just like you see it in 3D View window unwrap the mesh using U > Project From View. From the wiki page:


  Project from View option maps the face as seen through the view of the 3D window it was selected from. It is almost like you had x-ray vision or squashed the mesh flat as a pancake onto the UV map.




Note that because this option takes into account only parts of the mesh which are pointed to the viewer in 3D View, you


  will get some stretching in areas where the model recedes away from you.


So use it when you know that you won't see areas in scene where faces of this mesh aren't pointed to camera.